Lawn-mower



(No Model.) 2 Sheets-Sheet. 1. C. W. CHENEY.

LAWN MOWBR.

No. 300,345. Patented June 17, 1884.

VITNESSED' vN. PUERS. Pncwumugnplwr. wzmingmn. nt..

(No Model.) 2 Sheets-Sheet 2.

C. W. CHENEY.

LAWN MOWBB.. Na 300,345. PatentedJune 17, 1884.

WWII/1471171111111' ldivrren Srn'rns Partnr wirres@ CHARLES TAR-RENCHENEY, OF ATi-IOL, MASSACHUSETTS.

LAWN-MOWER.

SPECIFICATION forming part of Letters Patent No. 300,345, dated June l71884.

Application filed November 6, 13315.

To MU whom' [t may concern:

3e it known that I, C. WARREN Gunner, a citizen of the United States,residing at thol, in the county of Torcester and State of Massachusetts,have invented a new and useful La\vn-Mower, of which the 'following is aspecification, reference being had to the accompanying drawings.

This invention relates to lawnqnowers; and its object is to provide amachine that will readily out any height ol" grass, that will not becomeclogged, and which will possess superior advantages in point ofsimplicity, iuexpensiveness, durability, and general eflieiency.

In the drawings, Figure l is a side view of iny improved mower. Fig. isa top View of the saine. Fig. is a bottoni view thereof. Fig. l is adetail plan view of the vibrating lever, its connections with theknife-operating levers, and its operating-cani. Fig. 5 is a detailsectional view through the cutter-bar on thc line :n ar, Fig. 2. Fig. Gis a detail plan view of one ofthe knives or cutters of the top series.Fig. 7 is a detail plan view of one of the knives of the bottoni series.Fig. S is a transverse vertical sectional view of the mower on the liney y, Fig.

Referring to the drawings, designates the 'li-aine of the machine, whichcomprises longitudinal inclined side bars, B B, carrying the transversecutter-supporting har C at their 'lowerfront ends, and connected by acrosspiece, D, at their rear top ends, the said trarne being mountedupon a transverse rotary axle or shaft, E, ucar its rear end, andprovided with a rearwardly-projecting operating-handle, F, that issecured to the side pieces, B B. The shaft E carries the drive-wheels GG, the connection between the saine being preferably by ine-ans of theusual pawl-and-ratchet mechanism, H, so that the shaft will only belocked with the wheels and turn duringtthe forward inoveinent of themachine, and will remain stationary during rearward movement of thewheels.

Secured to the shaft is a cani-plate or wave-wheel, I, having lateralcani projections J J at each side of its periphery, which alternat-elyengage each side of the front bil'urcated end, K, of a vibrating lever,L, that is pivoted to the under side of the cross-piece D, as shown atM, the end K being preferably provided with friction-rollers N X,against which the cam projeoti ons J J bear. By this nica-ns a vibratingor oscilla-ting inotion is imparted to the lever L as the shaft Erevolves, and this motion is transmitted to the longitudinal levers Oand P, that are fulcrunied on the side pieces, B B, as shown at Q, andare connected, respectively, to the front and rear ends ol' lever L bypivoted links R and S. The pivot M of the lever L is preferably extendedupward, as shown at l, to forni a brace for the handle F. The lowerl'ront ends of the levers O and l? are pivotallyr connected, as show-nat U, to rearward extensions or arins V V, respectively upon the topcutter-bar, XV, and the corresponding bottom cutter-bar, X, which barsare thereby reciprocated in opposite directions in the cuttensupportingbar C.

Y designates the knives or cutters, which, in lieu of being rl-shaped,have one ot' their edges about at a right angle to the cuttenbar, bywhich straight line the grass will be invariably cut. The knives of thebottoni series have their cutting-edges beveled on their under side, asshown at. f/I, while the knives of the top series have their edgesbeveled on their top side, as shown at A, and the knives of both serieshave their straightedges all at the sanie side, whereby, as the series.move in opposite directions, the slanting edges C'l ol.' one series cutwith the straight edges of the other series. The play oi' the levers Oand l) is preferably su'llicient to cause the edges or' the knives ol"one series to cross the edges or' two knives ol the other series at eachstroke, thus performing two cuts at each stroke, and, besides, servingto keep the knives clean and free from clogging.

Frein the foregoing description the operation and advantages ol" myinvention will be readily understood. The cutter-bar C is held above theground by a roller, Di, that has bearings on the sides B P, j ust inrear of the cutter-bars. The bearing-plates El E2 of the roller D2 areadjustable longitudinally in relation to the bars B B by ineans ofset-screws F2, working through slots Gfl in the plates E2. By thusadjusting the position of the roller, the height of the cutter-bar abovethe ground can bc readily regulated, as the 'frame A will turn on thebearings of the axle or shai't E.

l. claim as niv inventionl.. The combination of the frame ol' the machine, the rotary axle carrying the drive- Wheels, acutter-supportingbar secured across the front of the frame, a cam-Wheel secured Iaboutcentrally on the axle, a horizontally-oscillating lever fulcrulned onthe frame just in rear of the eanrwheel, longitudinal oscillating leversfulcrurned at the sides of the levers pivoted on the frame at its sides,the links connecting said levers With different ends of the oscillatinglevers, and the oppositely-lnoving cutter-bars arranged one above theother, and pivotally connected to thelower ends of the longitudinallevers, substantially as set forth.

3. In a lawn-mower, the combination of the independent series of kniveso'r cutters disposed one series directly above the other andreciprocating in opposite directions, the teeth being formed with onestraight edge at about a right angle' to the cutter-bar, substantiallyas and for the purpose set forth.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in presence of two Witnesses.

CHARLES XVARREN CHENEY. XVitnesses:

GEO. M. GERRY, HENRY M. BURLEIGIL

